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    叶片结冰特性及疏水弹性涂层的脱冰试验

    Icing Characteristics of Blades and Deicing Test of Hydrophobic Elastic Coating

    • 摘要: 为探究叶片结冰特性及疏水弹性涂层的脱冰效果与脱冰特性,在风电厂实地搭建了试验风机,采用图像法分析了风机叶片的结冰特性,并对比了疏水弹性涂层采用手工涂敷和喷枪喷涂的脱冰效果,以及涂层对明冰和霜冰的脱除效果。结果表明:霜冰和明冰均主要分布在叶片的前缘,相比霜冰,明冰在叶片前缘分布的范围较大,且随着旋转半径的增大,叶片结冰量增多,呈线性关系;采用疏水弹性涂层后,叶片接触角约增加64%;得益于涂层的光滑疏水表面特征和微尺度的形变能力,叶片的冰黏附强度降低约93%;在叶片结冰时,受周期性切向力的作用,有涂层的叶片可以及时甩脱覆冰,且手涂涂层的脱冰效果优于喷涂涂层,涂层对明冰的脱除效果优于霜冰。

       

      Abstract: In order to investigate the blade icing characteristics, the deicing effect and deicing characteristics of the hydrophobic elastic coating, an experimental wind turbine was built in a wind power plant.The icing characteristics of the wind turbine blades were analyzed using the image method, and the deicing effect of the hydrophobic elastic coating using manual coating and spray gun was compared, as well as the deicing effect of the coating on glaze ice and rime ice. Results show that both rime ice and glaze ice are mainly distributed on the leading edge of the blade. Compared with the rime ice, the glaze ice is distributed in a larger range on the leading edge of the blade. As the rotation radius increases, the amount of ice on the blades increases in a linear relationship. After using the hydrophobic elastic coating, the contact angle of the blade increases by approximately 64%. Thanks to the smooth hydrophobic surface characteristics and microscale deformation ability of the coating, the ice adhesion strength of the blade is reduced by about 93%. When the blade freezes, under the action of periodic tangential force, the ice on the coated blade can be thrown off in time, and the deicing effect of the manual coating is better than that of the sprayed coating. The deicing effect of the coating on glaze ice is better than that of rime ice.

       

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